Blade for me, my first Scotty Cameron was a Newport 2 Mid Slant, I now game a 2008 Studio Select. a 2008 Buttonback or a 2012 Newport 2 depending on my form or green conditions, I also have a Fastback 1.5 which I use if I need a complete change.

I've always had a blade Scotty for no other reason than it looks better to me at address. My stroke has more of an arc to it anyway.
That doesn't say I'm opposed to using any other style putter. I do have a few mallet style putters sitting in the wings.
But I do putt better with a blade. And putting is all about confidence!
If I knew the ball would go in the hole with a shell at the bottom of a piece of bamboo (Thurston Howell III reference) then I would use that too!

I'm still trying to decide what I like I currently own a cheap mallet just to try it out. But not sure how much I really like it or I'm just still that bad at putting lol.

Always been a blade guy, but that 2021 Phantom X 5.5 looks dang good.

Former blade guy, but Scotty's Red X center shafted changed that. Love the feel and forgiveness of a mid mallet.